Road anchoring means



Ja n. 23, 1940.

R. s. PEIRCE 2,187,912

ROAD ANCHORING MEANS Filed April 13, 1936 z j Peirce. J

Patented Jan. 23, 1 940 iUNlT E D sTArgs ',I'hisinvention relates to road anchoring means of the general class referred to in patent to 'Trester No. 1,471,074 of October 16,1923, wherein an anchor member is embedded in an initially soft hardenable material such as concrete or the like while the material is initially soft, thev member being held by a form while the concrete is poured around it, with one end of the memberiadjacent an edge of the concrete so thatafter the concrete bodies. are in abutment and'the said anchoring-means is imbedded within said bodies I to anchor thebodies together.

"One objection'to the conventional construction ofthe type referred to. in Trester isf'that' the anchor is not readily adaptable for installation on the job while the original body of concrete is beingpoured'to form the main portion of the-road or' the like; and furthermore, Trestersancho'r member is not of a type which can beibought on the market as an ordinary article oi commerce,

both of these objectionable features "in devices of the type shownby Trester enhancing the cost both of material and installationwhich the pres- I ent invention aims to avoid; v I

It is of course old, as will be seen ifrom'such patents as Ackerman No. 1,416,433 of May. 16, 1922, to embed an anchoring device in a body of initially soft hardenable material by means ofa form which holds'the anchoring device whilethe material is poured around it and thereafter re: moving the vform, leaving the'anchor member acoessible to the insertion of a screwbolt, for example, the anchor member having a threaded socket for receiving the screw bolt, after which other initially soft hardenable material may be poured about the screw bolt orprotruding portion o'fthe anchor membenas shown in the pat em to Trester already referred to.

@[The presentinvention, however, discloses a highly useful and novel improvement'over the the present invention, may be aligned endv to end operatively engaged, by means of the novel separable adapter which, the present invention includes, to thus be anchored in the abutting bodies of concrete and to anchor these bodies seline thereof.

ical and eificient road anchoringmeans. 1 (Other objects and advantages willbe apparen from the following description, taken together with the accompanying drawing, in which .Figure 1 is a vertical sectional View of a fra PATENT OFFICE ment of concrete roadway or the like with :one

portion of the anchoring means embedded there,- in, andshowing a conventional method of supporting the anchoring means during pouring of the concrete; Figure 2 is a somewhat similar View but showing the form removed and another slab of concrete poured adjacent to the first slab, with the remainder of the anchoring means embedded therein; j Figure 3 is a view somewhat similar to. Fig. 1 but of a modified embodiment of the invention Figure 4 is a view somewhat similar to Fig.2 but, corresponding to Fig. 3; I Figure 5 shows a still further modification;

my improved adaptor;

Figure 7 is an end view of the same; and

Figure 8 shows thethreads thereof'still further enlarged, 1 I

Referring in detail to the figures of ,the drawing, the line Ill may indicate the top surface of the usual foundation for a roadway orithe like. As my invention is most commonly used-in connection with the pouring of adjoiningI-slabs-of concrete with'the joint'between the slabs run-' ning parallel with the roadway, the form ll may represent a wooden form supported on'the foundation II! and extending parallel with the roadway, for example along a median longitudinal Suitable means (not shown) may begprovided' for maintaining the form II in up.-

being poured and while it is retained by the form H at one side thereof. Before pouring of the,

} hook end- 14 farthestfrom the form H and with its outer shank end I! threaded as at l 5), passing through the form and secured thereto by the nuts 16, 16a which temporarily clamp the bolt to the form, thus supporting the bolt in position to have the concretel2 poured about it. There upon,,after hardening of the concrete, the outer nut lSis screwed off of'the bolt, and the form ll removed, leaving the threadedend I! of'the bolt projecting beyond the edge It of the concrete.

;When it is desired to widentheroad by pouring another slab of concrete parallel'with thei-slab 12, either at the time when the road is first con Figure 6 is an enlarged sectional axial view- 0f" right position while the first concrete slab I2 .is

structed or at a considerably later time, the pro- "jecting end H of the bolt 13 may have screwed bolt as shown in Fig. 2 it thereupon becomes a g support for the remainder of the anchor means as shown by the second conventional hook-bolt 2I which is exactly like the bolt I3 and is screwed into the outer end of the socket piece I9, the hook-bolts thus having their threaded ends end to end within the socket piece. 'I'hereupon the second slab of concrete 22 may be poured to abut the edge I8 of the first slab which becomes the meeting face of the two slabs, with the bolt I3 embedded in one of the slabs I2 and the bolt 2| embedded in the other slab 22, the bolts being operatively interengaged by means of the separable socket piece I9 so that the bolts serve as economical and effective anchoring means securing the slabs I2 and 22 together.

If it is desired to have portions of the concrete itself interlock, the bolt I3 may be supported on the form II by a cup-shaped stamping 23 (as shown in Fig. 3) the flanged periphery 23a of which is secured to the inner face of the form I I by nails 24 and the inwardly oifset portion 25 of which is perforated as at 26 to have the threaded end of the bolt passed therethrough and clamped thereto by the nuts I6, I 6a. In this instance the bolt does not'need to pass through the form I I.

In accordance with the Fig. 3 modification, after the concrete I2 is poured and has set, the form II is pulled away from the nails 24 and the nut I6 removed from the bolt. Thereupon the stamping 23 may be also removed to be used again, leaving the recess 2'! in the edge of the concrete I2 with the threaded end II of the bolt exposed within this recess. Then the socket piece is screwed onto the bolt and the bolt 2| is secured into the socket piece as already described, and the second slab of concrete 22 poured about the socket piece and bolt. In this instance the interlocking tongue 28 of the concrete 22 fills the recess 21, and affording a tongue-and-groove formation with the socket piece in the middle.

' As shown in Fig. 5 the socket piece I9 may be initially embedded in the first slab of concrete I2, the socket piece in this instance acting as a support for the bolt I3 on the form II. For this purpose, I have shown the socket piece I9 formed with a flange 29 at one end in the periphery of which are one or more, in this instance two, notches 30 serving as nail holes for the nails 3I, which pass into the form II.

In some uses, it may be desirable to have the bolt 2I without threads so that it may move longitudinally in the socket piece to compensate for expansion or contraction of the concrete and for this purpose I desirably form the threads 32 of the bolt 20 of the socket piece in truncated form, as shown in Fig. 8. The truncated threads afford substantially a continuous bearing surface for such an unthreaded bolt or pin.

A further advantage of the separable socket piece is that it is reversible so that the flange 29 may be at' either end. Thus, as in Fig. 2, the flange provides an effective stop by abutment with the edge I8 of the concrete, while, as in Fig. 4, the reduced end 33 of the socket piece may be placed toward the meeting forces of the concrete so as to suit the shape of the recess 21 and avoid-interierencewith the flange29.-

It will be perceived that by making the threads truncated, while the bore 20 is still of the same diameter, a bolt of the diameter of the bolts I3 and 2I but unthreaded may be snugly received therein, as well as similarly threaded bolts. This, in addition to the flanged portion 2I at one end only of the socket piece, greatly enhances its adaptibility and usefulness for the purposes described.

While the hook-bolts shown substantially enhance the efiective anchor between the adjoining slabs of concrete, a further advantage of the hook-bolt is that it may be hooked about a reinforcement such as the rod 34 which is also embedded in the concrete running parallel with the edge thereof, as is common in conventional road-building practice.

Having described my invention, I claim:

1. In road anchoring means of the class described, the combination with an integral initially plastic body, of an exteriorly screw-threaded anchor member for embedment in said body and a separable adaptor having a screw-threaded bore extending entirely therethrough for partially overlapping screw-threaded attachment of one end of said adaptor to said anchor member, both member and adaptor being imbedded in the same integral plastic body and being intended to be secured to another similar member in an adjacent initially plastic body also by partially overlapping screw-threaded attachment ofthe other end of said adaptor, said adaptor having at one end only a flanged portion, whereby the adaptor may be selectively reversed on said anchor member, with the adaptor serving as an operative continuation of said anchor member and the position of said flanged portion with respect thereto being either at one end or intermedially of said anchor member and adaptor jointly, as and for the purpose described.

2. In road anchoring means of the class described, the combination with an integral initially plastic body having a projecting integral tongue portion for interlocking with a groove in an adjacent initially plastic body, of a rod-like anchor member for embedment in said body and a separable adaptor having a bore extending entirely therethrough for partially overlapping telescoping attachment of one end of said adaptor to said anchor member, both member and adaptor being embedded in the same first mentioned integral plastic body and being intended to be secured to another similar member in said adjacent initially plastic body, also by partially overlapping telescoping attachment of the other end of said adaptor, said adaptor having at one end only a flanged portion, whereby the adaptor may be selectively placed on said anchor member with the adaptor serving as an operative continuation of said anchor member and with the flanged portion of the adaptor located intermedially of said anchor member and adaptor jointly and the unflanged portion of said adaptor projecting into said tongue, as and for the purpose described.

RALPH S. PEIRCE. 

